/Engine/Plugins/Runtime/Metasound/Source/MetasoundFrontend/Public/MetasoundFrontendController.h
Sets the sort order index for the input with the given name. No-ops if input not found.
void SetSortOrderIndexForInput ( const [FVertexName](API\Plugins\MetasoundGraphCore\FVertexName) & InName, int32 InSortOrderIndex )